Home / 42,781.91-64,169.22-13,199.99

Finding the Fourth Proportional to 42,781.91, 64,169.22 and 13,199.99

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Solution

The fourth proportional to 42,781.91, 64,169.22 and 13,199.99 is: 19,798.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,781.91 : 64,169.22 = 13,199.99 : x
  2. Step 2: Convert to fraction form
    42,781.91/64,169.22 = 13,199.99/x
  3. Step 3: Cross multiply
    42,781.91x = 64,169.22 × 13,199.99
  4. Step 4: Simplify right side
    42,781.91x = 847,033,062.31
  5. Step 5: Solve for x
    x = 847,033,062.31/42,781.91
  6. Step 6: Final answer
    x = 19,798.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.